Honeywell Commercial Programmable T7350 Users Manual 63 4368 Thermostat

2015-01-23

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T7350
Commercial Programmable Thermostat
SYSTEM ENGINEERING
Contents
Introduction ..................................................................................................................................
Device Description ..............................................................................................
Control Application ..............................................................................................
Network Control Provided ...................................................................................

2
2
2
3

Models ..................................................................................................................................
Products Covered ................................................................................................
Applicable Literature ............................................................................................

3
3
4

Abbreviations and Definitions ..................................................................................................................................
Performance Specifications .................................................................................
Communications ..................................................................................................
LONMARK® Functional Profile ..............................................................................

4
5
7
8

Network Configurations ..................................................................................................................................

Application Steps ..................................................................................................................................
Overview .............................................................................................................
Step 1. Plan the System ......................................................................................
Step 2. Determine Required Network Devices ....................................................
Step 3. Layout Communications and Power Wiring: ..........................................
LONWORKS® Bus Layout ......................................................................................
Cable Termination ...............................................................................................
Wiring Details ......................................................................................................
Step 4. Prepare Wiring Diagrams ........................................................................
General Considerations .......................................................................................
Step 5. Order Equipment .....................................................................................
Step 6. Configure T7350 .....................................................................................
Step 7. Troubleshooting .......................................................................................

10
10
11
11
11
11
12
12
12
15
17
17
18

Appendix A - Network Tools & Workstations ......................................................................................................................... 20
Appendix B - Network Alarm Reporting .................................................................................................................................. 21
Appendix C - Network Error Reporting ................................................................................................................................... 23
Appendix D - Network Access to Local Sensor Data ............................................................................................................. 25
Appendix E - Scheduling Network Devices ............................................................................................................................ 25
Appendix F - Network Master Clock ........................................................................................................................................ 25
Appendix G - Network Connections to Other LCBS Devices ................................................................................................ 26
Appendix H - T7350H Network Variable Summary ................................................................................................................. 34

® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

INTRODUCTION
Device Description

Control Application

The T7350H is a LONMARK® certified thermostat that provides
networking capability in a LONWORKS® system using a

The T7350H programmable communicating Thermostat
controls commercial single zone heating, ventilating and air
conditioning (HVAC) equipment through staged and
modulating outputs. The T7350H consists of a two piece
assembly with a thermostat cover and subbase. The
thermostat cover includes the keypad and display for 7-day
programming. Calendar programming is available through a
direct connect PDA (Configuration Tool) or network
(LONSPEC™ with model T7350H) tool configuration. The
subbase includes equipment control, inputs and network
connections. The subbase mounts on the wall and the
thermostat cover mounts to the subbase. In addition, the
T7350H model can communicate local sensor data, schedule
information, master clock operations and accept configuration
and override instructions to or from other devices/tools in a
LONWORKS® network. Fig. 9 shows a typical T7350H
application in a three-stage heat and two-stage cool heat
pump system. For additional hookups, see Fig. 10 through 12.

transformer-coupled Free Topology Transceiver (FTT). See
Fig. 1.

The T7350H communicates with many LONMARK® devices
including the following:
— Other T7350H Communicating Commercial Thermostat
devices.
— T7300F/Q7300H Commercial Thermostat/Communicating
Subbase.
— Excel 15 S7760A Command Display.
— Excel 10 W7750A,B,C Constant Volume Air Handler Unit
(CVAHU) Controller.
— Excel 15 W7760A, B, C Building & Plant Managers.
— Excel 10 W7751B, D, F, H, J Variable Air Volume Terminal
Unit Controllers.
— Excel 10 W7752D, E, F, G Fan Coil Unitcontrollers.
— Excel 10 W7753A Unit Ventilator Controller.
— Excel 10 W7762A,B Hydronic Controllers.
— Excel 10 W7763C, D, E Chilled Ceiling Controllers.
BUILDING MANAGER

NOTEBOOK PC

WALL MODULE

EXCEL 15
W7760

EXCEL 10
CVAHU

30 31

RS-232
SERIAL
PORT
SLTA

S7760

Back

LonWorks

BUS

T7350H

Select

MODEM

BUILDING MANAGER
1

WALL MODULE

EXCEL 15
W7760

EXCEL 10
CVAHU

MODEM

30 31

RS-232
SERIAL
PORT
SLTA

S7760

Back

LonWorks

BUS

T7350H

Select

M22490

Fig. 1. Typical T7350H LONWORKS® network diagram.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Network Control Provided

Products Covered

The T7350H communicates with other network devices, or
nodes, for sharing data such as local inputs. Through the
network, a Command Display (S7760) is used to view or
modify T7350H operational modes including:
• Weekly Schedule.
• Holiday Schedule.
• Room Temperature SetPoints (Occupied, Unoccupied,
Standby).
• Manual Occupancy Override.
• Temperature Setpoints.
• Update Time Clock.

This System Engineering manual describes how to apply the
T7350H Communicating Thermostat and related accessories
to typical applications. Devices include:
• T7350H Commercial Communicating Thermostat.
• Excel 15 W7760A or B Building Manager.
• Excel 15 W7760C Plant Manager.
• Excel 10 Controllers including: W7750, W7751, W7752,
W7753, W7762.

Network connected Workstations and Configuration Tools are
used to view and modify additional T7350 operational modes:
• Command Fan operating mode (On, Auto)
• Command Application mode (Auto, Off, Heating, Cooling)
By using network messaging, the T7350H may share the
following local inputs with other T7350, T7300/Q7300, XL15
or XL10 network connected devices:
• Room Humidity and Temperature.
• Outdoor Air Temperature.
• Occupancy Sensor.
• Unoccupied Bypass User Input.

Other products:
• Q7760A Serial LonTalk® Adapter.
• Q7740A,B FTT Repeaters.
• 209541B FTT Termination Module.
See Table 2 for additional products.
Table 2. Additional Products.
Part Number

Product
Description

R8242A

Contactor, 24 Vac
coil, DPDT.

AT72D, AT88A …

24vac
Transformers.

Network messaging also supports distribution of local user
commands and operational states from a single T7350H. That
is, network connected T7350H and XL10 devices can be
configured to follow the local user commands and states from
a single (master) T7350H. These local T7350 commands
include the following:
• Application mode (Auto, Off, Heating, Cooling).
• Occupancy (Occupied, Unoccupied, Bypass, Standby).
• Bypass (unoccupied override).
• Setpoint.
• Time synchronization from a T7350H designated as
network master clock.
• Master Time Scheduling of Occupied, Unoccupied and
Standby states.

T7770A-D

Wall Modules

T7771

Wall Module with
active display.

4074EYD

Wallplate for
T7770 Wall
Modules.

AK3798

Single pair network
cable, U.L. Type
CMR

AK3797

Single pair network
cable plenum
rated, U.L. Type
CMP

MODELS

AK3799

Double pair
network cable
plenum rated, U.L.
Type CMP

Table 1. T7350 Communicating Thermostat Models.

Comments

For covering an
existing hole in
a wall

Maximum
Stagesa
Model

Applications

Heat

Cool
3 (4)b

Features

T7350H1009

Conventional
or
Heat Pump

3 (2)b

T7350H1017

Modulating

2 modulating, 2c Humidity, Occupancy,
Outdoor, Discharge Air
relay
Capability, 4-20 mA
output (2-10 Vdc with
500 ohm resistor)

Humidity, Occupancy,
Outdoor, Discharge Air
Capability

a All

models are down-selectable and can be configured to
control fewer stages than the maximum allowed.
b Heat pump applications for these models have a maximum
of two heat stages and two cool stages.
c One extra stage (of either heat or cool) can be configured
using the auxiliary relay.

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Applicable Literature

LONSPEC™) that writes the binding information into the
EEPROM memory of all the neuron’s involved. The binding
information is saved in the network image of each neuron.

The following list of documents contains general information
related to the T7350H Communicating Commercial
Thermostats.

Building Manager—A LONMARK® certified device that can be
used to monitor and control HVAC equipment and other
miscellaneous loads in a distributed network.

Table 3. Applicable Literature
Form No.

Title

Command Display—A device that can be used to monitor
data and change parameters of network connected devices.

63-1299

T7350 Commercial Programmable
Thermostat Spec Data

62-0195

T7350 Commercial Programmable
Thermostat Installation Instructions

63-2605

T7350 Commercial Programmable
Thermostat Product Data

Excel 10s—A family of application - specific HVAC controllers
such as the Excel 10 CVAHU and Excel 10 VAV.

74-2976

Excel LONSPEC™ ZL7760A Specification
Data

HVAC—Heating, Ventilating and Air Conditioning.

74-2937

Excel LONSPEC™ ZL7760A User’s Guide

I/O—Input/Output.

74-3123

Light Commercial Building Solution System
Communication Guide

74-2697

T7770A, B, C, D, E, F, G Wall Module
Specification Data

95-7538

T7770A, B, C, D, E, F, G Wall Module
Installation Instructions

63-2617

T7771 Wall Module Product Data

74-2972

S7760A Command Display Specification
Data.

74-2858

Q7740A,B FTT Repeater Specification
Data.

95-7555

Q7740A,B FTT Repeater Installation
Instructions.

74-2954

Q7760A SLTA-10 Serial LonTalk® Adapter
Specification Data.

95-7511

Q7760A SLTA-10 Serial LonTalk® Adapter
Installation Instructions.

95-7554

209541B Termination Module Installation
Instructions

CVAHU—Excel 10 Constant Volume Air Handler Unit
Controller.

LCBS—Light Commercial Building Solution. These systems
are configured with the LONSPEC™ network tool and
monitored with a Workstation such as LonStation®. Many
LCBS networks include the W7760B & C plant managers.
Routers (including Q7751A) are not supported by the LCBS
network configuration LONSPEC™ tool.
LONSPEC™-ZL7760A—A network connected tool which
configures, commissions, calibrates and monitors the
Honeywell Light Commercial Building Solution Q7300,
T7350H, Excel 10 and Excel 15 family of controllers.
LONSTATION™—A low-cost, easy-to-use Light Commercial
Building Solution workstation that provides advanced building
control capabilities for small to medium-size buildings.
LONWORKS® Network—A data network based on neurons
communicating with each other using the LonTalk® protocol.
Mandatory Mechanisms/Objects/Network Variables—
Mandatory mechanisms and network variables that are
implemented in all the Excel 10 devices.
NamedObjects—These objects are visible on the network as
functional independent entities and are accessed by name.
Typical examples of NamedObjects are Controllers,
ControlLoops and LogicFunction blocks contained in devices
such as the XL5a or XL15b.

ABBREVIATIONS AND DEFINITIONS
Application—A special use Building Control function.
Binding—The process of logically connecting network
variables in one node to network variable(s) in other node(s).
Binding is performed by a network management Tool (such as

63-4368

Network Management Node—A LONWORKS® node that is
responsible for configuring the network, installing the nodes,
binding the network variables between nodes, and general
network diagnostics.

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Network Variables—A class of variables defined in Neuron C
that allows communication over the LONWORKS® network to
other nodes on the network. An output network variable in one
node can be bound to a corresponding input network
variable(s) in other node(s). Changing the value of the output
network variable in one node causes the new value to be
automatically communicated to the bound input network
variable(s) in other node(s). When an input network variable is
updated, a nv_update_occurs and the event is posted at the
receiving node(s) so that the application program can take
action based on the change. A network management node
(for example XL15A or XL15C) that explicitly reads and/or
writes the network variable can also poll network variables.
Network variables can contain one data field (one or two
bytes) or multiple data fields (a structure).
Neuron—Refers to the Echelon® semiconductor device which
implements the LONWORKS® protocol on a network connected
device such as the T7350H Honeywell controller.
Node—A device implementing layers one through six of the
LonTalk® protocol including a Neuron® Chip, transceiver,
memory, and support hardware.

RIO—Excel 10 Remote Input/Output device.
RTC—Real Time Clock.
Schedule—The structure that defines the occupancy states
and the time of the changes between these states. In the case
of the T7350, schedules are organized around a eight day
weekly structure including an extra day for designated
holidays. Holidays are scheduled by yearly calendar events.
SGPU—Significant Event Notification and Guaranteed
Periodic Update.
SGPUC—Significant Event Notification and Guaranteed
Periodic Update with Change Field.
SLTA—Serial LonTalk® Adapter. Adapts the transformer
coupled LonTalk® messages to the RS-232 Serial Port.
SNVT—Standard Network Variable Type.
SCPT—Standard Configuration Parameter Type.
XL15A—W7760A Honeywell building level controller.

Notebook PC—Portable personal computer.
PDA—Personal Digital Assistant. In the case of the T7350
product this is a hand held electronic device operating with the
Palm OS. A Honeywell provided PDA application program is
used to configure the T7350 thermostat using a direct RS232
connection. Before purchasing a PDA, check the latest
Configuration software release note for a list of qualified PDA
models. Network connected T7350H models can be
configured without a PDA using LONSPEC™.
Programmable Controller—A controller that has a variable
number of control loops of different types and is user
programmed to execute an application. The user can select
the number and type of control loops. The user also has the
capability of generating new types of control loops. Some
examples of Honeywell programmable controllers include the
XL15A and XL15B.
Recovery Mode or Recovery Period—The time in
unoccupied periods when the temperature control is adjusting
the control setpoint so that the space temperature reaches the
occupied setpoint when the schedule change occurs.

XL15B—W7760B Honeywell building level controller.
XL15C—W7760C Honeywell plant level controller.

Performance Specifications
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
this unit might not exactly match listed specifications.
This product is tested and calibrated under closely
controlled conditions; minor performance differences
can be expected if those conditions are changed.
Models: See Table 4.
Dimensions: See Fig. 2.
Finish (color): Trident White.
Batteries: No batteries required.

Table 4. T7350 Thermostat Features.
Maximum Stagesa
Model

Applications

Heat

T7350H1009 Conventional 3 (2)b
or
Heat Pump
T7350H1017 Modulating

Cool
3 (4)b

Features
Humidity, Occupancy,
Outdoor, Discharge Air Capability

Auxiliary LONWORKS®
Capability?
Relay
Isolated Yes
Normally
Open

2 modulating, 2c relay Humidity, Occupancy,
Outdoor, Discharge Air Capability,
4-20 mA output (2-10 Vdc with 500 ohm resistor)

Yes

a All

models are down-selectable and can be configured to control fewer stages than the maximum allowed.
pump applications for these models have a maximum of two heat stages and two cool stages.
c One extra stage (of either heat or cool) can be configured using the auxiliary relay.
b Heat

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Mounting Means:
Mounts on subbase.
Subbase Mounts On:
Wall: Using two 5/8 in. long #6-32 screws (included).
Outlet Box: Using sheet metal screws.
Throttling Range for Modulating Outputs:
Automatically adjusts based on heat/cool stages. Manually
adjustable with PDA.
Clock Accuracy (at 77°F [25°C]): ±1 min./month (30 days).
Minimum Stage Operation Time (fixed):
Minimum On
Heat: 1 minutes.
Cool: 3 minutes.
Minimum Off (Cool and Heat Pump): 1 minute.
Electrical Ratings:
Power: 24 Vac, 50/60 Hz.; 20 to 30 Vac, 50/60 Hz.
Input:
Temperature: 20K ohms.
Humidity: 0-10 Vdc.
Outdoor: 3000 PTC.
Discharge Air: 20K ohms.
Occupancy Sensor: Dry contact switching 30 Vdc at 1 mA.
All Relay Outputs (at 30 Vac):
Running: 1.5A maximum.
Inrush: 7.5A maximum.
Modulating Output: 4 to 20 mA with 510 ohm maximum
terminating resistance.
System Current Draw (without load):
5 VA maximum at 30 Vac, 50/60 Hz.
NOTE: Relays are N.O. Single-Pole, Single-Throw (SPST).
Outdoor Sensor Wiring: Requires 18 gauge wire.
Humidity Ratings: 5% to 90% RH, noncondensing.
Emergency Heat Indication:
Display indicates when Emergency Heat is activated (Em).
Temperature:
Ratings:
Operating Ambient: 30°F to 110°F (-1°C to 43°C).
Shipping: -30°F to +150°F (-34°C to +66°C).
Display Accuracy: ±1°F (±1°C).
Setpoint:
Range:
Heating: 40°F to 90°F (4°C to 32°C).
Cooling: 45°F to 99°F (7°C to 37°C).
Deadband: 2°F (1°C).
Default Settings: See Table 5.
Loss of Power: The thermostat maintains programmed times
and temperatures for the life of the product. Clock and day
information is retained for a minimum of 48 hours.
NOTE: To achieve the 48-hour power-loss clock retention,
the T7350 must be powered for at least 5 minutes.

63-4368

Communicating Model T7350H:
Connection Terminals for the LONWORKS® Bus.
Network jack for quick access by personal computer based
tools.
Communications service-pin pushbutton to simplify startup.
LONMARK® Functional Profile: 8500_20 Space Comfort
Controller.
LONMARK® SCC Object Type: 8504 Rooftop See Fig. 3.
LONMARK® Program Identifier: 80:00:0C:55:04:03:04:2E.
LONMARK® Application Interoperability: version 3.3
Honeywell LONMARK® Plug-In file downloads:
http://plugin.ge51.honeywell.de/index.htm#
PDA System Requirements:
Palm OS: 3.5.x to 5.2.1
Dynamic Heap: 256K bytes.
Free RAM Space: 1000K bytes.
Serial Communications: RS232.
Approvals:
European Community Mark (CE) Listed.
UL 873 Recognized, NEC Class 2.
FCC Part 15 subpart J Class A.
cUL.
Table 5. Default Setpoints.
Occupied

Not
Occupied

Standby

Heating

70°F (21°C)

55°F (13°C)

67°F (19°C)

Cooling

75°F (24°C)

85°F (29°C)

78°F (26°C)

Control

Accessories:
Duct Discharge Air Sensors: C7041B (6 or 12 in.),
C7041C (18 in.), C7041J (12 ft averaging),
C7770A (8 in. probe).
Outdoor Air Sensors: C7089A, C7170A,
C7031G2014 (weatherproof).
Temperature Sensors (Remote): C7772A, T7770A1006,
T7770B1046, T7770C1044, T7770D1000, T7771.
Economizer Logic Modules: W6210, W6215, W7210, W7212,
W7215, W7459.
Humidity Sensors: H7625A,B; H7635A,B,C, H7655B.
PDA Units: Palm™ V, M125, and i705 handhelds;
TRGPro™ handheld; ZIRE™ 71 handheld;
TUNGSTEN™ T handheld.
Others:
209541B FTT network termination module.
209651A Vertical Mounting Hardware Wallplate Adapter
(Trident white).
50000083-001 Thermostat Interface Module (TIM).
50000452-001 Troubleshooting Cable.
AK3797 Single pair network cable plenum rated,
U.L. Type CMP.
AK3798 Single pair network cable, U.L. Type CMR.
AK3799 Double pair network cable plenum rated,
U.L. Type CMP.
Q7740A FTT network 2-way repeater.
Q7740B FTT network 4-way repeater.
TG511, TG512 Universal Versaguard™ Thermostat
guards.

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Communications

2-3/16 (56)
1-9/16
(40)

6-3/4 (171)

4-1/2
(114)

SUBBASE

2-1/32
(52)
4-1/16
(104)

2-1/32
(52)

1-5/8
(42)

2-3/8 (60)
3-1/4 (83)
6-9/16 (166)

1-5/8
(42)
M22432

Fig. 2. Dimensions of thermostat and subbase in in. (mm).

The T7350H provides networking capability in a LONWORKS®
system using a Free Topology Transceiver (FTT) transformercoupled communications port running at 78 kilobits per
second (kbs). The transformer-coupled communications
interface offers a much higher degree of common-mode noise
rejection while ensuring dc isolation. LONWORKS® FTT
networks are very flexible and convenient to install and
maintain, but it is imperative that the network layout be
carefully planned and accurate documentation created and
maintained. This aids in compliance verification and future
expansion of the network. It also minimizes unknown or
inaccurate wire run lengths, node-to-node (device-to-device)
distances, node counts, total wire length, inaccurate repeater/
router locations, and misplaced or missing terminations.
LONWORKS® networks can be configured in a variety of ways;
refer to the E-Bus FTT Network Wiring Guidelines, form 742865, for a complete description of network topology rules and
maximum network wire length. If longer runs are required, add
a Q7740A 2-way or Q7740B 4-way repeater to extend the
LONWORKS® Bus length. Q7751A routers are not supported
on LCBS LONSPEC™ configured systems. Approved cable
types for LONWORKS® Bus communications wiring are Level
IV, 22 AWG (0.34 sq mm) plenum or non-plenum rated
unshielded, twisted pair, solid or stranded conductor wire.
Refer to Table 2 for a list of Honeywell network cable part
numbers. Other Echelon® approved cable may also be used.
Run communications wiring in a conduit, if needed, with nonswitched 24 Vac or sensor wiring. The Free Topology
Transceiver (FTT) communications LONWORKS® Bus supports
a polarity insensitive, free topology wiring scheme that, in turn,
supports star, loop, and/or bus wiring.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

LONMARK® Functional Profile
Hardware Output

Hardware Output
SCC-Rooftop
Object Number 8504.

Node
Object
nv1

Mandatory
Network
Variables

nviRequest
SNVT_obj_request

nv3

nviTimeSet
SNVT_ time_stamp

nv5

nviFileReq
SNVT_file_req

nv7

nviFilePos
SNVT_file_pos

nv2

nv6

nvoStatus
SNVT_ obj_status

nv1

nvoFileStat
SNVT_file_status

Optional
Network
Variables

Configuration Properties
nc1 - nciDeviceName
nc2 - nciApplVer

nv9

UCPTdevName
UCPTapplVer

nviInUse
UNVT_inUse

(manf specific)
(manf specific)

nv11 nroT7350Ver
UNVT_version

nviPgm
nv10 UNVT_pgmIn

nroPgmVer
nv12 UNVT_pgmId

Manufacturer
Defined
Section

nv13 nvoPgm
UNVT_pgmOut

nviSpaceTemp
SNVT_temp_p

Mandatory
Network
Variables

nvoSpaceTemp
nv26 SNVT_ temp_p
nv27 nvoUnitStatus
SNVT_hvac_status

nv2

nviSetpoint
SNVT_ temp_p

nv28 nvoEffectSetpt
SNVT_temp_p

nv5

nviOccSchedule
SNVT_tod_event

nvoEffectOccup
nv29 SNVT_occupancy

nv6

nviOccManCmd
SNVT_occupancy

nv7

nviOccSensor
SNVT_occupancy

nvoDischAirTemp
nv34 SNVT_temp_p

nv8

nviApplicMode
SNVT_hvacMode

nv37 nvoTerminalLoad
SNVT_lev_percent

Optional
Network
Variables

nv30 nvoHeatCool
SNVT_hvac_mode

nv19 nviOutdoorTemp
SNVT_Temp_p

nv43 nvoSpaceRH
SNVT_lev_percent

nv20 nviSpaceRH
SNVT_lev_percent

nv45 nvoOutdoorTemp
SNVT_temp_p

Configuration Properties
nc1 - nciSndHrtBt
nc4 - nciRevHrtBt
nc2 - nciSetpoints
nc6 - nciBypassTime
nciConfig
nciConfigPts
nciDayLghtSav
nciDaySchedule0
nciDaySchedule1
nciDaySchedule2
nciDaySchedule3
nciDaySchedule4
nciDaySchedule5
nciDaySchedule6
nciDaySchedule7
nciHolSched

nvoTime
nv14 SNVT_time_stamp
nvoAlarmH
nv15 UNVT_alarm
nv16 nvoAlarmStatus
UNVT_alarmStatus
nvoAlarmLog
nv17 UNVT_alarmLog
nvoError
nv18 UNVT_error

Hardware Input

SNVT_time_sec
SNVT_time_sec
SNVT_temp_setpt
SNVT_time_min
UCPTconfig
UCPTconfigPts
UCPTdaylightSav
UCPTschedule0
UCPTschedule1
UCPTschedule2
UCPTschedule3
UCPTschedule4
UCPTschedule5
UCPTschedule6
UCPTschedule7
UCPTholSched

nv30 nviBypass
SNVT_switch
nviFanAuto
nv31 SNVT_switch
nv32 nviManValue
UNVT_manValue

(mandatory)
(optional)
(mandatory)
(optional)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)
(manf specific)

nv43 nvoBypass
SNVT_switch

Manufacturer
Defined
Section

nviDlcShed
nv34 UNVT_dlcShed

nvoOccSchedule
nv44 SNVT_tod_event
nv45 nvoOccSensor
SNVT_occupancy
nvoData1
nv46 UNVT_data1
nvoData2
nv47 UNVT_data2

Hardware Input

Fig. 3. T7350H LONMARK® Space Comfort Controller Rooftop Object (8504) with Node Object.

63-4368

M22431

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

NETWORK CONFIGURATIONS

the user is not prevented from making local schedule
changes at the recipient thermostat. Local schedule
changes (at a recipient device) have no effect on the
scheduling commands received from the master device.
When a T7350H is designated as a master schedule
device, it sends its schedule information (current state,
next state, time until next change of state) to the
appropriate T7350H(s) which, in turn, overrides any
existing internal time schedule. The T7350H Thermostat
can provide master scheduling information to multiple
Excel 10 devices. One T7350H shares the schedule
information (current state, next state, time until next
change of state) with the designated Excel 10 devices.

The T7350H can be configured to perform a variety of
activities in which data is sent to and/or received from other
nodes on the LONWORKS® network. Information that can be
shared with other network devices includes:
— Current year, month, day, hour, minute, second.
— System mode (HEAT, COOL, AUTO, OFF, EM HEAT).
— Current fan setting (ON, AUTO).
— Space temperature.
— Space relative humidity.
— Discharge air temperature.
— Outdoor air temperature.
— Occupancy sensor status.
— Terminal load.
— Current setpoint.
— Occupied/Unoccupied schedule commands.
— Current occupancy status.
— Occupancy schedule including current occupancy state,
next state and time in minutes until next scheduled
change of occupancy state.
— Relay status (heat/cool stages and fan).
— Alarm status.
— Alarm log including the last five alarms.
— Device Error status.
— Bypass state (multiple XL10 devices follow the bypass
operation of a master device).

Source
T7350H.nvoOccSchedule
or
XL15a.nvoTodEventCmd[i]
Q7300.nvoOccSchedulei

• Time Master:
When a T7350H is designated as the network time master,
the current time of day and date is synchronized across the
network every minute. The LONSPEC™ T7350H General
Screen can be used to configure a T7350H as the Network
Time Master. Whenever the time of day or date of the time
master is changed, it automatically adjusts all the other
network devices (T7350H, Q7300 & XL15A) bound to the
time master. When a T7350H is controlled by a time
master, the local day light saving schedule is disabled. The
Day Light Saving option on all time master recipients
should be disabled. This prevents erroneous time changes
(local daylight savings switchover) during temporary
network outages.
Destination

T7350H.nvoTime
or
XL15a.nvoTimeOut
Q7300.nvoTime

T7350H.nviTimeSet
or
XL15a.nviTimeIn
Q7300.nviTime

T7350H.nviOccSchedule
or
XL10.nviTodEvent
XL15c.nviTodEventIn[i]

• System Mode Settings:
System mode settings (HEAT, COOL, AUTO, OFF, EM
HEAT) can be commanded by a remote T7350H or other
compatible XL10 device. A one to many network binding
can be used to command multiple devices from a single
unit. In addition, a network connected Workstation can be
used to change the System Mode.

A network configuration tool is used to configure the T7350H
Thermostats and other nodes with which the T7350H
interacts. The following is a brief description of the
configurable features that can be commanded over the
network:

Source

Destination

Command Source
T7350H.nvoHeatCool
or Workstation

Source
Workstation
or Network Tool

Destination
T7350H.nviFanAuto

• Outdoor Air Temperature Sharing:
If a valid outdoor air temperature value is received at the
T7350H OAT network variable input, that value will be used
in the T7350H. The local OAT sensor of the T7350H is
ignored until the network sensor fails.

T7350H.nviOutdoorTemp
or
XL10.nvoOdTemp
XL15c.nvoOdTemp

T7350H.nviApplicMode

• Fan Settings:
Fan settings (ON, AUTO) can be changed from a network
connected Workstation.

Source

• Time Schedule:
The occupancy schedule used by a T7350H may reside
locally in that device or remotely in another schedule
device (T7350H, XL15a, XL15b or T7300/Q7300). Local
schedules can be created and modified using the T7350H
keypad, a direct connected PDA, a network connected
configuration tool (LONSPEC™) or Command Display.
External schedules can also be modified using the keypad
of the master schedule device, or with a network
connected configuration tool or Workstation. When a
T7350H receives scheduling information over the network,

Command Destination

Destination
T7350H.nvoOutdoorTemp
or
XL10.nviOdTemp
XL15c.nviOdTemp

• Discharge Air Temperature Sharing:
The discharge air temperature value can be shared with
other devices on the network. Note that the T7350H does
not accept a network discharge air temperature input.
Source
T7350H.nvoDischAirTemp

Destination
XL15c.nviDATemp

• Space Temperature Sharing:
If a valid space temperature value is received at the
T7350H Space Temperature network variable input, that
63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

value will be used in the T7350H as the primary controlled
variable. The local space temperature sensor of the
T7350H is ignored until the network sensor fails.
Source

Destination

T7350H.nvoSpaceTemp
or XL10.nvoSpaceTemp

T7350H.nviSpaceTemp

• Occupancy Bypass:
Any internal or external scheduled unoccupied state in the
T7350H is overridden by a network occupancy bypass
command. Bypass is a method to command unoccupied
override over the network from another controller (typically
a T7350H or XL10). The source controller manages the
bypass timing.
Source

• Space Humidity Sharing:
If a valid humidity value is received at the T7350H Space
Humidity network variable input, that value will be used in
the T7350H as the humidity control variable. The local
space humidity sensor of the T7350H is ignored until the
network sensor fails.
Source

Destination

T7350H.nvoSpaceRH

T7350H.nviSpaceRH
or XL15c.nviRARH

• Current Setpoint Sharing:
If a valid setpoint value is received at T7350H nviSetpoint,
that value will be used by the T7350H as the center
setpoint. The heat and cool setpoints are then calculated
from this value and are used in the T7350H as the
occupied setpoints. During unoccupied periods,
nviSetpoint is ignored.
Source

Destination

T7350H.nvoEffectSetpt
or XL10.nvoEffectSetpt

T7350H.nviSetpoint

• Occupancy Sensor Sharing:
If a valid value is received at the T7350H occupancy
sensor network variable input, that value will be used in the
T7350H as the occupancy sensor. The local T7350H
occupancy sensor is ignored until the network sensor fails.
Source

T7350H.nviOccSensor

Source
Workstation
Command Display
XL15b

Destination
T7350H.nviOccManCmd

The application steps shown in Table 7 are guidelines for
configuring the T7350H in a LONWORKS® Bus network and
explain the network role of the T7350H.
Table 7. Application Steps.

The T7350H effective occupancy is determined in Table 6.

Step

Table 6. T7350H Effective Occupancy.
Occupancy/Motion
Sensor Contact

• Manual occupancy:
Provides a method to command the occupancy state from
a network workstation. Effective occupancy override works
on a “last in wins” basis. That is, the last occupancy
override command received from any source determines
the override state. The workstation can command
occupied, unoccupied, standby, bypass, or not active (null).
There are several ways to return the device to normal
schedule operation.
1. Power failure reset at the T7350H.
2. Workstation issues a “not active” (null) network command to T7350H.nviOccManCmd.
3. User activates “Temporary Occupied” button on the
local keyboard. This can be followed by a “Run Schedule” local command.
4. If manual occupancy is commanded to bypass and the
bypass timer times out.

Overview

NOTE: The occupancy or motion sensor is active whenever
the device is scheduled “Occupied” and a remote or
network occupancy sensor is configured.

Schedule
Occupancy

T7350H.nviBypass

APPLICATION STEPS

Destination

T7350H.nvoOccSensor
or XL10.nvoSensorOcc
NetworkSensor

T7350H.nvoBypass
or
XL10.nvoBypass
XL15a.nvoBypass[i]
XL15c.nvoBypass[i]

Destination

Effective
Occupancy

Description

Plan the system.

Determine required network devices.

Lay out communications and power wiring.

Occupied

Open

Standby

Occupied

Closed

Occupied

Prepare wiring diagrams.
Order equipment.

Standby

Unoccupied

Configure T7350.

Troubleshooting.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Step 2. Determine Required Network Devices

Refer to the Light Commercial Building Solution System
Communication Guide form 71-3123 and the E-Bus Wiring
Guidelines, form 74-2865 for a complete description of
network topology rules. Prepare Wiring Diagrams, for wiring
details. Plan to configure each controller. Refer to the Excel
LONSPEC™ User Guide, form 74-2937, to configure the
T7350H, XL15 and XL10 Controllers.

A maximum of 60 nodes can communicate on a single
LONWORKS® Bus segment. Each LONWORKS® Bus device
comprises one node. If more than 60 nodes are needed, a
Q7751A Router or Q7740 Repeater is necessary. A router or
repeater allows up to 120 controller nodes per network,
divided between two LONWORKS® Bus segments. Please note
that routers are not supported by the LCBS LONSPEC™
system configuration tool. Refer to the Light Commercial
Building Solution System Communication Guide form 71-3123
for LCBS details. Refer to the E-Bus Wiring Guidelines, form
74-2865, for a complete description of network topology rules
and maximum wire lengths. A 209541B Termination Module
may be required. Refer to the Excel 10 FTT Termination
Module Installation Instructions form, 95-7554.

Step 1. Plan the System
Plan the use of the T7350H Thermostat according to the job
requirements. Determine the location and functionality of each
device. Verify the sales estimate for the number of other
controllers and devices required. Check the number and type
of other required accessories. When planning the system
layout, consider potential expansion possibilities for future
growth. Planning is very important if HVAC systems and
controllers are to be added in future projects.

Step 3. Layout Communications and Power
Wiring:

NOTEBOOK PC

LONWORKS® Bus Layout

SHIELDED
INTERFACE
CABLE
RS-232
SERIAL
PORT

The communications LONWORKS® Bus, is a 78-kilobit network
that uses transformer isolation and differential Manchester
encoding. The Free Topology Transceiver (FTT) LONWORKS®
communications Bus supports a polarity insensitive, free
topology wiring scheme, refer to the E-Bus Wiring Guidelines
form, 74-2865, for a complete description of LONWORKS®
network topology rules. Fig. 5 shows T7350H devices
connected in a typical free topology LONWORKS® network.

T7350H

Q7760
SLTA
CABLE
PART
NO. 205979

LonWorks
BUS PORT
M22492

Fig. 4. Connecting personal computer to LonWorks® bus.
NOTEBOOK PC

T7350H

T7770
WITH NO
LonWorks
BUS ACCESS

RS-232
LonWorks

SLTA

BUS

T7350H

MODEM

MODEM
RS-232

SLTA
LonWorks

T7350H

BUS
T7350H

MODEM
RS-232
LonWorks

SLTA

BUS
T7770

LonWorks

BUS
JACK FOR OPERATOR TERMINAL

I/O CONNECTIONS

M22493

Fig. 5. Typical topology for T7350 devices in LONWORKS® network.
11

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Cable Termination

CAUTION

The FTT network segment requires termination for proper
data transmission performance. Use a 209541B Termination
Module to connect two of the three termination module wires
to the LONWORKS® Bus terminals. Refer to LONWORKS® Bus
Wiring Guidelines form 74-2865 for details.

Singly Terminated Network Segment
In a singly terminated topology segment, only one termination
is required and can be placed anywhere on the segment.
Singly terminated segments use the yellow and brown wires.
If the network topology requires a singly terminated
termination module at a T7350H, connect the singly
terminated module wiring on the appropriate terminals as
shown in Fig. 6.

SUBBASE
T5

AUX W3/Y4 Y3

AUX

IMPORTANT
All wiring must agree with applicable codes, ordinances and regulations.
1.

Loosen subbase terminal screws and connect system
wires.

NOTE: Maximum (and recommended) wire size is 18gauge. Do not use wire smaller than 22-gauge. Follow equipment manufacturer wiring instructions
when available. Refer to the Wiring Diagram section
for typical hookups. A letter code is located near
each terminal for identification. Refer to the Specifications section, Tables 8 and 9 for terminal designations.
2. Securely tighten each terminal screw.
3. Push excess wire back into the hole in the wall.
4. Plug the hole with nonflammable insulation to prevent
drafts from affecting the thermostat.

YELLOW

BROWN

Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.

PART NO. 209541B
TERMINATION MODULE
ORANGE

Wiring Details

M22494

Fig. 6. Singly terminated LonWorks® bus termination
module.

Doubly Terminated Daisy-Chain Network Segment
In a doubly terminated daisy-chained topology segment, two
terminations are required, one at each end of the topology
segment. Doubly terminated segments use the orange and
brown wires. If the network topology requires a doubly
terminated module at a T7350H (T7350H is the first or last
device on the network cable) connect the termination module
wiring on the appropriate terminals as shown in Fig. 7. For
additional wiring information, refer to the E-Bus Wiring
Guidelines, form 74-2865, and the Excel 10 FTT Termination
Module Installation Instructions, form 95-7554.

LONWORKS® network cable should be wired separately from
the power and I/O wires when installing T7350H models. If
this is not possible, use a minimum of 4 in. (102 mm)
separation between split ferrite cores (Fair-Rite 0443164151,
www.fair-rite.com) to ensure compliance with Class B limits
(does not apply to Class A limits). See Fig. 8 to apply ferrite
cores to LONWORKS® Bus input and output.

Step 4. Prepare Wiring Diagrams
Fig. 9 through 12 show T7350 terminal arrangements and
provide detailed wiring diagrams. Reference these diagrams
to prepare the site-specific job drawings.

WIRES TO T7300H
COMMUNICATING SUBBASE

SUBBASE
T5

BROWN

AUX W3/Y4 Y3

AUX

WIRES TO ALL
INPUTS AND
OUTPUTS

ORANGE
PART NO. 209541B
TERMINATION MODULE

YELLOW

2.
WIRES TO ALL
INPUTS AND
OUTPUTS

M22495

Fig. 7. Doubly terminated LONWORKS® bus termination
modules.
M22496

WIRES TO T7300H
COMMUNICATING SUBBASE

Fig. 8. Ferrite core wires from T7350H to LONWORKS®
inputs and outputs.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

OUTDOOR
AIR
SENSOR

T7770 REMOTE SENSOR

DISCHARGE
AIR
SENSOR

COMPRESSOR
CONTACTOR 2

ECONOMIZER

HEAT
RELAY 3

HEAT
RELAY 2

SUBBASE
T5

AUX W3/Y4 Y3

AUX

COMPRESSOR
CONTACTOR 3
LONWORKS®
BUS

HUMIDITY
SENSOR

MOTION
SENSOR

HEAT
RELAY 1

LONWORKS®
BUS

FAN
RELAY

COMPRESSOR
CONTACTOR 1
L2

L1
(HOT)

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22499

Fig. 9. Typical hookup of T7350H1009 in three-stage heat and three-stage cool conventional system with one
transformer.

OUTDOOR
AIR
SENSOR

T7770 REMOTE SENSOR

COMPRESSOR
CONTACTOR 2
DISCHARGE
AIR
SENSOR

HEAT
RELAY 3

HEAT
RELAY 2

SUBBASE
T5

AUX W3/Y4 Y3

AUX

COMPRESSOR
CONTACTOR 3
LONWORKS®
BUS

HUMIDITY
SENSOR

MOTION
SENSOR

LONWORKS®
BUS

HEAT
RELAY 1

4
ECONOMIZER

FAN
RELAY

COMPRESSOR
CONTACTOR 1

L2
L1
(HOT)
L2
L1
(HOT)

AUXILIARY
TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.

HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22497

Fig. 10. Typical hookup of T7350H1009 with auxiliary transformer.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

MODULATING R
COOL
–
+ (4-20 mA) X

OUTDOOR
AIR
SENSOR

T7770 REMOTE SENSOR

MODULATING
HEAT
–
+ (4-20 mA)

DISCHARGE
AIR
SENSOR

R
X

SUBBASE
T5

AUX

2
LONWORKS®
BUS

HUMIDITY
SENSOR

LONWORKS®
BUS

COMPRESSOR
CONTACTOR 1

3
L2

FAN
RELAY

HEAT
RELAY 1

MOTION
SENSOR

ECONOMIZER

L1
(HOT)

HEATING
TRANSFORMER

COOLING
TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22498

Fig. 11. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent
cool stages (one modulating), and two transformers.

MODULATING R
COOL
–
+ (4-20 mA) X

OUTDOOR
AIR
SENSOR

T7770 REMOTE SENSOR

MODULATING
HEAT
–
+ (4-20 mA)

DISCHARGE
AIR
SENSOR

R
X

SUBBASE
T5

AUX

2
LONWORKS®
BUS

HUMIDITY
SENSOR

HEAT
RELAY 1

MOTION
SENSOR

LONWORKS®
BUS

FAN
RELAY

COMPRESSOR
CONTACTOR 1
3

ECONOMIZER
1

L1
(HOT)

L2
COOLING
TRANSFORMER
HEATING
TRANSFORMER

L2
L1
(HOT)

AUXILIARY
TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.

USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.

M22491

Fig. 12. Typical hookup of T7350H1017 for system with two independent heat stages (one modulating), two independent
cool stages (one modulating), and three transformers.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

General Considerations
Table 8 lists wiring types, sizes and distances for the T7350
and Excel 10 products. The T7350 terminal strip accepts 18
through 22 AWG (0.82 to 0.34 sq. mm) wire.
Table 8. Field Wiring Reference.
Recommended Wire
Size (Minimum)

Specification or
Requirement

Digital Outputs:
W Y G AUX X

18 AWG (0.82 sq mm)
five wire cable bundle.

Standard thermostat
wire.

AK3726

1000 feet.

Modulating Outputs:
MX MH MC

18 AWG (0.82 sq mm)

1 pair per output.

AK3757C, AK3744C,
AK3741A, AK3702x

1000 feet.

Remote Humidity
Sensor:
HS HC HP

18 to 22 AWG
(0.82 to 0.34 sq mm)

3 wires.

AK3746C, AK3724,
AK3703x

500 feet.

Discharge Air
Temperature Sensor:
AS

18 to 22 AWG
(0.82 to 0.34 sq mm)

1 pair.

AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C

1000 feet.

Outdoor Air
Temperature Sensor:
OS

18 AWG (0.82 sq mm)

1 pair.

AK3757C, AK3744C,
AK3741A, AK3702x

500 feet.

Motion Sensor:
M

18 to 22 AWG
(0.82 to 0.34 sq mm)

1 pair.

AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C

1000 feet.

Wall Module
connections:
T3-T7

18 to 22 AWG
(0.82 to 0.34 sq mm)

Twisted pair wire is
recommended for wire
runs longer than 100
ft. The number of pairs
depends on the model
and functions
selected.

AK4606ABE,
AK4628AWH,
AK3702x, AK3741A,
AK3744C, AK3757C,
AK3726

1000 feet.

Power Wiring to:
X RH RC

18 to 141 AWG
(0.82 to 2.0 sq mm)
use heavier wire for
longer runs.

NEC Class II,
140°F (60°C) rating.

AK3702x, AK3741A,
AK3744C, AK3757C,
AK3712x, AK3754

Limited by line-loss
effects on power
consumption.

LONWORKS® Bus
(Non-Plenum).

22 AWG
(0.34 sq mm)

Nema Level IV
U.L. Type CMR
Twisted pair stranded
conductor,
nonshielded.

AK3798 (1 pair)

Refer to E-bus Wiring
Guidelines Users
Guide 74-2865 for
maximum length and
generic cable
specifications.

LONWORKS® Bus
(Plenum Rated).

22 AWG
(0.34 sq mm)

Nema Level IV
U.L. Type CMP
Twisted pair stranded
conductor,
nonshielded.

AK3797 (1 pair)
AK3799 (2 pair)

—

Wire Function

NOTE:

Honeywell Part
Number

Distance (Maximum)

1. The X, RH and RC terminals will accept 14 to 22 AWG. 14 and 16 AWG should be avoided since the stiff cable
interferes with the cover to subbase installation.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 9. Honeywell Cable Details.
Honeywell Part
Number

Size (AWG)

Number of wires

Jacket

Plenum Rated

Description

AK3798

Yes

E-bus cable.

AK3797

Yes

E-bus cable.

AK3799

Yes

E-bus cable.

AK4606ABE

Yes

Beige jacket.

AK4628AWH

Yes

White jacket.

AK3702x

—

AK3741A

Yes

—

AK3744C

Yes

Red jacket.

AK3757C

Yes

White jacket.

AK3703x

—

AK3724

Yes

Tan jacket.

AK3746C

Yes

Tan jacket.

AK3726

Yes

Tan jacket.

AK3712x

TFN

AK3754

TFN

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Step 5. Order Equipment
After compiling a bill of materials through completion of the
previous application steps, refer to Table 10, Ordering
Information.
Table 10. Ordering Information.
Part Number

Product Description

T7350H1009

Communicating Thermostat with three heating and
three cooling digital outputs.

• Optional heat pump control.
• Isolated auxiliary digital output.

T7350H1017

Communicating Thermostat with two modulating
outputs, one heating and one cooling digital output.

• Isolated auxiliary digital output.

T7771A

Remote Temperature Sensor.

• Pushbutton setpoint adjustment with LED indicators.
• Occupied/unoccupied override (bypass) with LED.
• LONWORKS® Bus jack.

T7770A1006

Remote Wall Module.

• Basic model with room temperature sensor.

T7770B1046

Remote Wall Module.

• ± setpoint change.

T7770C1044

Remote Wall Module.

• ± setpoint change.
• OCC button and LED.

T7770D1000

Remote Wall Module.

• OCC button and LED.

AK3798

LONWORKS®

Bus (Non-Plenum), 1 pair.

—

AK3797

LONWORKS®

Bus (Plenum rated), 1 pair.

—

AK3799

LONWORKS®

Bus (Plenum rated), 2 pair.

—

209541B

FTT Network Termination Module.

—

H7625
H7635

Remote Humidity Sensors

—

C7089A
C7170A,
C7031G2014

Outdoor Air Sensors.

—

Duct Discharge Air Sensors:
6 inch probe.
18 inch probe.
150 inch averaging.
6 inch probe.

—

50000452001

Troubleshooting Cable.

One Troubleshooting Cable required for each
installation technician.

50000083001

Thermostat Interface Module (TIM).

One TIM required for each installation technician. Note
that a network tool such as LONSPEC™ eliminates the
need for a TIM.

PDA

Qualified Palm OS PDA.

One PDA required for each installation technician.
Refer to the PDA Configuration Software for an up-todate list of qualified PDA hardware. Note that a network
tool such as LONSPEC™ eliminates the need for a PDA.

50000314001

PDA Configuration Software.

One Configuration software package can be used to
program multiple PDAs. Note that a network tool such
as LONSPEC™ eliminates the need for a PDA.

C7041B
C7041C
C7041J
C7770A

Comments

Step 6. Configure T7350
Use Excel LONSPEC™ Software to configure the T7350H
Thermostat for specific applications. The Excel LONSPEC™
User’s Guide, form 74-2937, provides software operation
instructions for this personal computer based application.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Step 7. Troubleshooting
Table 11. Troubleshooting Information.
Symptom

Possible Cause

Action

Display will not
come on.

Thermostat is not being powered.

Check that X terminal is connected to the system transformer.
Check for 24 Vac between X and RH terminals.
If missing 24 Vac:
• Check if circuit breaker is tripped; if so, reset circuit breaker.
• Check if system fuse is blown; if so, replace fuse.
• Check if the HVAC equipment power switch is in the Off position; if
so, set to the On position.
• Check wiring between thermostat and HVAC equipment. Replace
broken wires and tighten loose connections.
If 24 Vac is present, proceed with troubleshooting.

Temperature
display is
incorrect.

Room temperature display has been Use PDA or LONSPEC™ configuration software to recalibrate as
recalibrated.
desired.
Thermostat is configured for °F or °C Press both Run Schedule and Copy, then reconfigure the display.
display.
Bad thermostat location.

Relocate the thermostat.

Display shows three dashes and a
T7350 is set for remote sensing and sensor is missing or circuit is
degree sign (all systems shut down). either open or shorted.
Temperature
settings will not
change.
(Example: Cannot
set heating higher
or cooling lower.)

Upper or lower temperature limits
were reached.

Check the temperature setpoints:
• Heating limits are 40 to 90°F (7 to 31°C)
• Cooling limits are 45 to 99°F (9 to 37°C)

Occupied setpoint temperature
range stops were configured.

Using a PDA or LONSPEC™, check setpoint stops. If necessary,
reconfigure the stop(s).

Keypad is locked. When a locked
key is pressed, LOCKED appears
momentarily on the LCD.

• Use PDA or LONSPEC™ (Set, Display) to unlock keypad.
• Press both Run Schedule and Copy, then change keypad lock
level.

Remote temperature sensing is not
Room
temperature is out working.
of control.

Check all remote sensors.

Heat will not come No power to the thermostat.
on.

63-4368

Thermostat minimum off time is
activated.

• Wait up to five minutes for the system to respond.
• Use PDA or LONSPEC™ to configure heating response.

System selection is set to Off or
Cool.

Set system selection to Heat or Auto.

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 11. Troubleshooting Information. (Continued)
Symptom
Cooling will not
come on.

Possible Cause

Action

No power to the thermostat.

Thermostat minimum off time is
activated.

• Wait up to five minutes for the system to respond.
• Use PDA or LONSPEC™ to configure cooling response.

System selection is set to Off or
Heat.

Set system selection to Cool or Auto.

System indicator The call for heat or cool is not yet
given.
(flame: heat,
snowflake: cool) is
displayed, but no
warm or cool air is
coming from the
registers.
Conventional heating equipment
turns the fan on only after the
furnace has warmed to a setpoint.
Heating or cooling equipment is not
operating.

Check if any stage indicators (dots next to the system indicator) are
displayed. With no display of stage indicators, no call for cool/heat is
yet given.
For the modulating T7350H1017 only: Check the information
screens. MODHEAT or MODCOOL percentages of zero and 100
indicate an extreme signal from the given terminal.
Wait one minute after seeing the on indicator and then check the
registers.
Verify operation of heating or cooling equipment in self-test.

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX A - NETWORK TOOLS & WORKSTATIONS

Device Configuration
View & Modify Weekly Schedule
View & Modify Holiday Schedule
Data Monitoring
Command Outputs to Manual Value
Override System Delays
Room Temperature Calibration
Command Occupancy Override
Command Fan Operation (On Auto)
Command System Mode (off, auto, heat, cool)
View & Modify Temperature Setpoints
Report T7350 alarm data
Network Time Scheduler for T7350 Devices
Generate Trend & Log files with T7350 data
User defined T7350 analog & digital alarms
Update T7350 Time Clock
Set T7350 as network Time Master
View T7350 Cover Firmware Version
Update T7350 Cover Firmware
View T7350H SubBase Firmware Version
Update T7350H SubBase Firmware

X
X
X
X
X
X
X
X
X
X
X
X

X
X
X
X
X
X
X
X
X
X

X
X
X

X
X

X
X
X

X
X
X
X
X
X

X
X

X
X
X
X
X
X
X
X
X
X
X

DataMon

LNS Plugin

CARE

Cmd Display S7760

W7760B XL15B

LONSPEC™

Network Tools & Workstations
Summary of
T7350H Operational Support

63-4368

LONSTATION™

Table 12. T7350H Operational Support.

X
X
X
X

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX B - NETWORK ALARM REPORTING
Table 13. T7350H Alarm Change of State Event.
A T7350H alarm change of state event is reported by the manufacturer defined output network variable nvoAlarmH.
nvoAlarmH Field

Description

subnet

The
subnet number in the domain entry to which nvoAlarmH is bound. If nvoAlarmH is not
bound, it reports domain index 0.
0: Invalid subnet (power up value)
1-255: Subnet number

node

The LONWORKS® node number in the domain entry to which nvoAlarmH is bound. If nvoAlarmH is not
bound, it reports domain index 0.
0: Invalid entry (power up value)
1-127: Node number

type

The alarm type being issued.
0: AT_NO_ALARM (power up value)
1: AT_INVALID_SUBBASE_TYPE
2: AT_NETWORK_COMM_FAIL
3: AT_SENSOR_FAIL
4: AT_INVALID_IO_CONFIG
5: AT_COVER_COMM_FAIL
6: AT_COVER_SUBBASE_MISMATCH
Return to Normal Codes
-127: AT_rtnINVALID_SUBBASE_TYPE
-126: AT_rtnNETWORK_COMM_FAIL
-125: AT_rtnSENSOR_FAIL
-124: AT_rtnINVALID_IO_CONFIG
-123: AT_rtnCOVER_COMM_FAIL
-122: AT_rtnCOVER_SUBBASE_MISMATCH
-1: AT_ALARM_NOTIFY_DISABLED

LONWORKS®

Table 14. T7350 Current Alarm Status.
The T7350 current alarm status is reported by the manufacturer defined output network variable nvoAlarmStatus.
nvoAlarmStatus
Field

Description

coverCommFail

Communications between the cover and sub-base.
0: No alarm (power up value).
1: The communications between the thermostat cover assembly and the sub-base has failed in one or
both directions. The data from the cover to the sub-base has not been received for at least 90
seconds, or data from the sub-base is not updating the cover assembly.

invalidIOConfig

Output configuration error.
0: No alarm (power up value).
1: The number of outputs configured exceeds the capability of the sub-base to support them.
Considers sub-base type, heat pump/conventional application, maxCoolStgs, maxHeatStgs.

sensorFail

Sensor failure.
0: No alarm (power up value).
1: One of the analog sensors on the cover assembly has failed or is out of range (high or low).

networkCommFail

Network Communications Failure.
0: No alarm (power up value).
1: One of the bound network input network variables is not being updated periodically. This alarm may
be caused by a failed node or a damaged LONWORKS NETWORK cable.

invidSubBaseTyp

Sub-base type error.
0: No alarm (power up value).
1: The detected sub-base type is not supported by the firmware version of the cover assembly.

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 15. Identifying Five Most Recent T7350 Alarms.
The five most recent T7350 alarms are identified in the manufacturer defined output network variable nvoAlarmLog.
nvoAlarmLog Field

Description

alarm1

Alarm log: Most recent alarm.
Alarm Codes
0: AT_NO_ALARM (power up value)
1: AT_INVALID_SUBBASE_TYPE
2: AT_NETWORK_COMM_FAIL
3: AT_SENSOR_FAIL
4: AT_INVALID_IO_CONFIG
5: AT_COVER_COMM_FAIL
6: AT_COVER_SUBBASE_MISMATCH
Return to Normal Codes
-127: AT_rtnINVALID_SUBBASE_TYPE
-126: AT_rtnNETWORK_COMM_FAIL
-125: AT_rtnSENSOR_FAIL
-124: AT_rtnINVALID_IO_CONFIG
-123: AT_rtnCOVER_COMM_FAIL
-122: AT_rtnCOVER_SUBBASE_MISMATCH
-1: AT_ALARM_NOTIFY_DISABLED

alarm2

Alarm log: 2nd most recent alarm.
0: No alarm (power up value).

alarm3

Alarm log: 3rd most recent alarm.
0: No alarm (power up value).

alarm4

Alarm log: 4th most recent alarm.
0: No alarm (power up value).

alarm5

Alarm log: Oldest alarm.
0: No alarm (power up value).

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX C - NETWORK ERROR REPORTING
Table 16. Reporting T7350H Errors.
T7350H errors are reported through the manufacturer defined output network variable, nvoError.
nvoError Field

Description

errLoclSpaceSensr

Local space temperature sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errRemtSpaceSensr

Remote space temperature sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errNetSpaceSensr

Network space temperature sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured by the thermostat to function but is not being updated by either the bound
network sensor or by the subbase (faulty subbase).

errLoclHumSensr

Local Humidity sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errRemtHumSensr

Remote Humidity sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errNetHumSensr

Network Humidity sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured by the thermostat to function but is not being updated by either the bound
network sensor or by the subbase (faulty subbase).

errRemtOdSensr

Remote Outdoor air sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errNetOdSensr

Network Outdoor air sensor not working.
0: Sensor value is OK. (power up value)
1: Sensor is configured by the thermostat to function but is not being updated by either the bound
network sensor or by the subbase (faulty subbase).

errRemtSetPt

Remote wall module set point is out of range or disconnected.
0: Value is OK. (power up value)
1: Remote wall module set point is configured to function and is out of range or disconnected.

errDischSensr

Discharge sensor out of range or disconnected.
0: Sensor value is OK. (power up value)
1: Sensor is configured to function and is out of range or disconnected.

errIOConfig

Output configuration error. Considers sub-base type, heat pump / conventional application.
maxCoolStgs, maxHeatStgs.
0: The outputs configuration is consistent with the sub-base type selected (power up value)
1: The number of outputs configured exceeds the capability of the sub-base to support them.

errSubBaseType

Sub-base type error.
0: The sub-base is a valid sub-base type (power up value)
1: The detected sub-base type is not supported by the firmware version of the cover assembly.

errUnused1

Not currently used

errSelfTest

Self test failure. Upon factory test power up, a self test of memory is performed. If external RAM,
EEPROM, or application FLASH memory fails the test, nvoError.errSelfTest is set. This bit is intended
for use in production testing. Field devices should ignore this bit.
0: Passed the test
1: Failed the test

errCoverCommFail

Communications between the cover and sub-base
0: No error (power up value)
1: The communications between the thermostat cover assembly and the sub-base has failed in
one or both directions. The data from the cover to the sub-base has not been received for at least
90 seconds, or data from the sub-base is not updating the cover assembly.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 16. Reporting T7350H Errors. (Continued)
T7350H errors are reported through the manufacturer defined output network variable, nvoError.
nvoError Field

Description

errSubBaseVerMisMatch Sub-base/cover firmware mismatch.
0: Sub-base and cover firmware are compatible. (power up value)
1: The firmware version in the sub-base is unable to communicate correctly with the firmware
version of the cover assembly. The cover assembly Public Interface number of the sub-base is not
compatible with the Public Interface number of the sub-base. That is nroT7350Ver.commVer does
not match the version supported by the sub-base. Communications with the sub-base is turned
off.
errNviSpaceTemp

nviSpaceTemp network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviOccSchedule

nviOccSchedule network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure).

errNviOccSensor

nviOccSensor network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviApplicMode

nviApplicMode network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviOutdoorTemp

nviOutdoorTemp network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviSpaceRH

nviSpaceRH network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviBypass

nviBypass network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

errNviDlcShed

nviDlcShed (Demand Limit Control Shed signal) network variable is:
0: either not bound or is bound and being updated periodically (power up value)
1: bound and not being updated periodically (communications or source node failure)

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX D - NETWORK ACCESS TO LOCAL SENSOR DATA
Table 17. T7350H Reports Local Sensor Data.
The T7350H reports local sensor data using the following output network variables.
Nv Name

LonSpec Reference
Name

Description

nvoDischAirTemp Discharge Temperature
Out

The current discharge air temperature. The sensor value source is configured
by nciConfig.dischAirSensor. A value of 327.67 means the sensor is not
functioning correctly or is out of range.
327.67: Power up value

nvoOccSensor

Status of occupancy sensor
0: OC_OCCUPIED
1: OC_UNOCCUPIED
-1: OC_NUL (not configured and power up value)

Occupancy Sensor Out

nvoOutdoorTemp Outdoor Temperature Out

The current outdoor temperature. The sensor value source is specified by
nciConfig.oDAirSensor. A value of 327.67 means the sensor is not functioning
correctly or is out of range.
327.67: Power up value

nvoSpaceRH

Space Humidity Out

The current space humidity. The sensor value source is specified by
nciConfig.humiditySensor. A value of 163.84 means the sensor is not
functioning correctly or is out of range.
163.84: Power up value

nvoSpaceTemp

Space Temperature Out

The current space temperature. The sensor value source is specified by
nciConfig.spaceSensor. A value 327.67 means the sensor is not functioning
correctly or is out of range.
327.67: power up value

APPENDIX E - SCHEDULING
NETWORK DEVICES

APPENDIX F - NETWORK MASTER
CLOCK

A T7350H can be used to time schedule the following
Honeywell controllers:
• Another T7350H.
• T7300/Q7300.
• XL15C application objects (Control loops/StartStop loops).
• XL10 controllers.

A T7350H can be used as the network time master for the
following network connected Honeywell controllers:
• Another T7350H.
• T7300/Q7300.
• XL15A.

A single T7350 can be configured to schedule all (up to 119)
of the compatible controllers connected to the same network.
This is accomplished by a one to many binding from the
source T7350 to the destination controller or object.
T7350.nvoOccSchedule > XL10.nviOccSchedule.

This is accomplished by a one to many binding from the
source T7350H to the destination controller. The following is
an example NV binding of one T7350H as a time master to
another.
T7350H.nvoTime > T7350H.nviTimeSet
LONSPEC™ automatically implements these NV bindings
based on the selection of Network Time Master check box on
the T7350 General configuration screen. The Day Light
Saving Start and Stop Month on all time master recipients
should be configured to None (invalid). This prevents
erroneous time changes during temporary network outages.

LONSPEC™ automatically implements these NV bindings
based on the selection of Unscheduled Objects (XL10(s),
Q7300(s), T7300H(s) and XL15cAP(s) located on the
LONSPEC™ T7350 Scheduling Screen.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX G - NETWORK CONNECTIONS TO OTHER LCBS DEVICES
Table 18. Network Connections to XL15A AP Inputs.
T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
XL15A
Application Object
Analog Alarm

Source T7350H
Network Variable

Application Input
Selected Analog Value

Network Variable Field

nvoSpaceTemp
nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp

Digital Alarm

Selected Digital Value

nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

Bypass Logs

Select Bypass Object

nvoEffectOccup

Run Times

Select Point Name

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

Trends

Trend Pt

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoSpaceTemp
nvoEffectSetpt
nvoEffectOccup
nvoHeatCool
nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp
nvoData1

63-4368

HeatStgsOn

nvoData1

CoolStgsOn

nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
Table 18. Network Connections to XL15A AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
XL15A
Application Object

Application Input

Source T7350H
Network Variable
nvoData2

DLC

Override If

Demand Limit Control

Network Variable Field
RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

nvoSpaceTemp
nvoEffectSetpt
nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp

Analog Logic Function

Analog Input

nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoSpaceTemp
nvoEffectSetpt
nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp
nvoData1

Digital Logic Function

Digital Input

PercentCmdHeat

nvoData1

PercentCmdCool

nvoAlarmStatus

CoverCommFail

nvoAlarmStatus

InvalidIOConfig

nvoAlarmStatus

SensorFail

nvoAlarmStatus

networkCommFail

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 18. Network Connections to XL15A AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
XL15A
Application Object

Control Loop

63-4368

Application Input

LoopDisable

Source T7350H
Network Variable

Network Variable Field

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

nvoAlarmStatus

CoverCommFail

nvoAlarmStatus

InvalidIOConfig

nvoAlarmStatus

SensorFail

nvoAlarmStatus

networkCommFail

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 18. Network Connections to XL15A AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15A application objects.
XL15A
Application Object

Control Loop

Start/Stop Loop

Source T7350
Network Variable

Application Input

Network Variable Field

nvoData2

RelayFan

nvoData2

dehumidActive

MainSensor

nvoSpaceTemp

ResetSensor

nvoEffectSetpt

LoopDisable

nvoDischAirTemp

nvoTerminalLoad

nvoSpaceRH

nvoOutdoorTemp

nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoAlarmStatus

CoverCommFail

nvoAlarmStatus

InvalidIOConfig

nvoAlarmStatus

SensorFail

nvoAlarmStatus

networkCommFail

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 19. Network Connections to XL15A AP Outputs.
T7350H Network Variable Inputs can be connected to XL15A application outputs.
XL15A
Application Object

Destination T7350H
Network Variable

Application Output

Network Time Schedule

Scheduled Device List

nviOccSchedule

DLC

External Load Assignment

nviDlcShed

Network Variable Field

Table 20. Network Connections to XL15C AP Inputs.
T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
XL15C
Application Object
Math Functions:

Source T7350H
Network Variable

Application Input
Analog Input

Network Variable Field

nvoSpaceTemp

Min, Max, Avg, Sqrt Add,

nvoEffectSetpt

Subt, Mult, Div

nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp
nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoData1

HeatStgsOn

nvoData1

CoolStgsOn

nvoData1

BypassTime

nvoOccSensor
nvoEffectOccup
nvoHeatCool
nvoData2
Math Functions:

stagesActive

nvoSpaceTemp

Network Special

nvoEffectSetpt

SNVT_temp_p

nvoDischAirTemp
nvoOutdoorTemp

Math Functions:

nvoSpaceRH

Network Special

nvoTerminalLoad

SNVT_lev_percent
Logic Loop

ACDO Analog Input
DCAO Analog Input

nvoSpaceTemp
nvoEffectSetpt
nvoDischAirTemp
nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp
nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoData1

HeatStgsOn

nvoData1

CoolStgsOn

nvoData1

BypassTime

nvoOccSensor
nvoEffectOccup
nvoHeatCool

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 20. Network Connections to XL15C AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
XL15C
Application Object
Logic Loop

Control Loop

Source T7350H
Network Variable

Application Input

Network Variable Field

nvoData2

stagesActive

DCAO Digital Input

nvoAlarmStatus

CoverCommFail

OR Digital Input

nvoAlarmStatus

InvalidIOConfig

AND Digital Input

nvoAlarmStatus

SensorFail

nvoAlarmStatus

networkCommFail

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

Relay Aux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

SetPtOverride Digital Input

nvoAlarmStatus

CoverCommFail

LoopDisable

nvoAlarmStatus

InvalidIOConfig

Bypass Input

nvoAlarmStatus

SensorFail

OccupancySensor

nvoAlarmStatus

networkCommFail

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 20. Network Connections to XL15C AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
XL15C
Application Object

Control Loop

Source T7350H
Network Variable

Application Input

Network Variable Field

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

MainSensor

nvoSpaceTemp

ResetSensor

nvoEffectSetpt

RecoverySensor

nvoDischAirTemp

LimitAnalogInput

nvoTerminalLoad
nvoSpaceRH
nvoOutdoorTemp
nvoData1

PercentCmdHeat

nvoData1

PercentCmdCool

nvoData1

HeatStgsOn

nvoData1

CoolStgsOn

nvoData1

BypassTime

nvoOccSensor
nvoEffectOccup
nvoHeatCool
Start/Stop Loop

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nvoData2

stagesActive

LoopDisable

nvoAlarmStatus

CoverCommFail

Bypass

nvoAlarmStatus

InvalidIOConfig

nvoAlarmStatus

SensorFail

nvoAlarmStatus

networkCommFail

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 20. Network Connections to XL15C AP Inputs. (Continued)
T7350H Network Variable Outputs can be used as inputs to XL15C application objects.
XL15C
Application Object

Source T7350H
Network Variable

Application Input

Network Variable Field

nvoAlarmStatus

InvalidSubBaseType

nvoError

errLoclSpaceSensr

nvoError

ErrRemtSpaceSensr

nvoError

ErrNetSpaceSensr

nvoError

ErrLoclHumSensr

nvoError

ErrRemtHumSensr

nvoError

errNetHumSensr

nvoError

ErrRemtOdSensr

nvoError

ErrNetOdSensr

nvoError

ErrRemtSetPt

nvoError

ErrDischSensr

nvoError

errIOConfig

nvoError

errSubBaseType

nvoError

errSubBaseVerMisMatch

nvoError

errNviSpaceTemp

nvoError

errNviOccSchedule

nvoError

errNviOccSensor

nvoError

errnviApplicMode

nvoError

errnviOutdoorTemp

nvoError

errnviSpaceRH

nvoError

errNviBypass

nvoError

errNviDLCShed

nvoData2

RelayHeat3

nvoData2

RelayCool3

nvoData2

RelayHeat2

nvoData2

RelayCool2

nvoData2

RelayAux

nvoData2

RelayHeat1

nvoData2

RelayCool1

nvoData2

RelayFan

nvoData2

dehumidActive

S7760 - Command Display
A network connected Command display can be configured (by
LonSpec) to implement the following T7350H functions:
View and Modify Schedules:
• Occupied, Unoccupied and Standby setpoints1
• weekly schedule
• holiday schedule
NOTE: If a T7350H is connected to a wall module with setpoint adjustment, the user will not be allowed to
change occupied setpoints through Command Display.

Command manual occupancy, Annunciate T7350H alarms,
Monitor T7350H data:
• Room Temperature
• Active Room Temperature SetPoint
• Occupancy Status
• Operating Mode
• Discharge Air Temperature
• Space Humidity
• Outdoor Temperature
• Heat Stages Active
• Cool Stages Active
• Heat Modulating Output Position
• Cool Modulating Output Position
• Bypass Minutes Remaining
• Auxiliary Relay Status
• Fan Status

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

APPENDIX H - T7350H NETWORK VARIABLE SUMMARY
Table 21. T7350H Network Variable Summary.
Nv Name
nciApplVer

LONSPEC™ Ref Name
Application version

Class
CONFIG

Description
Application type: identifies the current application number for this
device given by a tool.
0: (Default).
Increment: increased by one whenever any configuration
parameter changed by PDA or thermostat keyboard. LONSPEC™
and LONSTATION™ does not change this field.
0: (Default).
Time Stamp: indicates the last change to the device application
configuration. The time stamp meets the ANSI C time stamp
requirement specifying the number of seconds elapsed since
midnight (0:00:00), January 1, 1970. It is represented in the Intel
Format. If the T7350 keyboard or the PDA Config Tool updates
any configuration parameters, the time is incremented.
0: (Default).
Version Number: identifies the version number of the application
for this device. If the T7350 keyboard or the PDA Config Tool
updates any configuration parameters, is incremented.
0: (Default).

nciBypassTime

Bypass Time

CONFIG

Temporary Occupied Override duration in minutes.
180: (Default).

nciConfig

FTP
CONFIG

Thermostat configuration parameters.

nciConfigPts

FTP
CONFIG

Thermostat operating setpoint values for the control algorithms
contained in the Thermostat application code.

nciDayLghtSav

FTP
CONFIG

Daylight-saving start and end calendar schedule.

nciDaySchedule0

FTP
CONFIG

Event time schedule for Sunday.

nciDaySchedule1

FTP
CONFIG

Event time schedule for Monday.

nciDaySchedule2

FTP
CONFIG

Event time schedule for Tuesday.

nciDaySchedule3

FTP
CONFIG

Event time schedule for Wednesday.

nciDaySchedule4

FTP
CONFIG

Event time schedule for Thursday.

nciDaySchedule5

FTP
CONFIG

Event time schedule for Friday.

nciDaySchedule6

FTP
CONFIG

Event time schedule for Saturday.

nciDaySchedule7

FTP
CONFIG

Event time schedule for designated Holiday.

nciDeviceName

Device Name

CONFIG

Device Name is an 18 character field used to identify the device
uniquely as one device at the site or project. The content of Device
Name is maintained by a management node. If Device Name is all
ASCII blanks, it is considered un-configured by Honeywell tools.
ASCII blanks: (Default)

nciHolSched

FTP
CONFIG

Holiday calendar schedule.

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name

LONSPEC™ Ref Name

Class

nciRcvHrtBt

Controller Receive Time

CONFIG

Receive heartbeat time (seconds) for all failure detect heartbeat
network variables in this node.
0: Disable failure (Default).
300: Typical value in Honeywell system.

nciSetpoints

Setpoint Config

CONFIG

Heating and Cooling SetPoints in Celsius engineering units.
Occupied cool set-point.
23.9 C: (Default)

Description

Standby cool set-point.
25.6 C: (Default).
Unoccupied cool set-point.
29.4 C: (Default).
Note:
It is required that:
UnoccCl>=OccCl>=OccHt+1.11 C.
UnoccCl>=StdByCl>=StdByHt+1.11 C.
If the above criteria is not met, then the nciSetpoints received over
the LONWORKS network will not be accepted, and all the current
controlling set points will be restored from the thermostat.
Occupied heat set-point.
21.1 C: (Default).
Standby heat set-point.
19.4 C: (Default).
Unoccupied heat set-point.
12.8 C: (Default).
It is required that:
UnoccHt<=OccHt<=OccCl-1.11 C.
UnoccHt<=StdByHt<=StdByCl-1.11 C.
If the above criteria is not met, then the nciSetpoints received over
the LONWORKS network will not be accepted, and all the current
controlling set points will be restored from the thermostat.
nciSndHrtBt

Controller Send Time

CONFIG

Send heartbeat time (seconds) for all Guaranteed periodic update
heartbeat network variables in this node.
0: Disable periodic update (Default).
55: Typical value in Honeywell system.

nroPgmVer

Program Version

CONST

The Honeywell program identifier and subbase firmware version
number.

nroT7350Ver

T7350 Version

CONST

Detailed T7350 cover assembly firmware version information.

nviApplicMode

Application Mode In

Thermostat System mode switch:
0: HVAC_AUTO
1: HVAC_HEAT
3: HVAC_COOL
6: HVAC_OFF
8: HVAC_EMERG_HEAT
Others: Considered to be HVAC_AUTO.
Failure detect and mains power up value: HVAC_AUTO.

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nviBypass

LONSPEC™ Ref Name
Bypass In

Class
IN

Description
Remote time bypass input from usually from another device.
Bypass is a method to command unoccupied override over the
network from another controller. The other controller does the
bypass timing. nviBypass can be used to place the T7350H into
temporary occupied mode. This mode will bypass the time of day
occupancy schedule in this device.
Value
State
Action
0
NA
Do not bypass the time of day
occupancy schedule.
NA
0.5 - 100
0

nviDlcShed

DLC Shed In

0 or -1
1 or
greater
0

Do not bypass the time of day
occupancy schedule.
Bypass the time of day occupancy
schedule.
Mains power up and fail detect value.

Demand limit duty cycle load shed command from a network
device.
When a shed request is received, the thermostat “bumps” the
control set point up for cooling and down for heating. The amount
of the “bump is a user set point selection. The shed state remains
until a DLC restore command is received or network
communication is lost. When the unit transitions from shed to
restore, the set point is ramped back to the original set point over a
period of 60 minutes. The control only sheds when the thermostat
is in the occupied mode.
Value:
0: No load shed being called (mains power up or failure detect
value).
1 or other values: Call for load shedding.

nviFanAuto

FanOnAuto In

Auto Fan switch (last in wins).
value = 0, state = don’t care:
Fan is On.
value = Don’t care, state = 0 or -1:
Fan is On.
Value = 0.5 - 100: state = 1 or greater:
Fan is On when there is a call for heat / cool.
Failure detect and mains power up value: No change from
previous value.
Value
State
Action
0
NA
Fan is ON.
NA

0 or -1

Fan is ON.

0.5 - 100

1 or
greater

Fan is ON when there is a call for
heat / cool.

no
change

Mains power up and fail detect value.

nviFilePos

File Position In

Supports LONMARK® FTP file transfer. Random Access file Pointer
to first byte to be transferred and Number of bytes to transfer.

nviFileReq

File Request In

Supports LONMARK® FTP file transfer. Message request
management is communicated through this input variable.

nviInUse

InUse

In use number is used by a management node to indicate to all
other management nodes that it is “logged on.”

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name

LONSPEC™ Ref Name

Class

Description

nviManValue

Manual Value In

Manual override values for outputs:
Relays: Y1, Y2, Y3, Aux, G, W1, W2, W3
Analog Outputs: Mc, Mh

nviOccManCmd

Occupancy Cmd In

Manual occupancy is a method to command the occupancy state
from a network workstation. Effective occupancy override works
on a “last in wins” basis. That is, the last occupancy override
command received from any source determines the override state.
The workstation can command occupied, unoccupied, standby,
bypass, or not active (null).
nviOccManCmd is used to place the T7350H into manual
occupancy (note there is no timer associated with
nviOccManCmd).
Manual occupancy input from a network device:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
2: OC_BYPASS
3: OC_STANDBY
-1: OC_NUL not connected (mains power up).
Others: same as OC_NUL.
NOTE: If nviOccManCmd is OC_BYPASS and the bypass timer
(nvoData1.bypassTime) times out, then nviOccManCmd
is set to OC_NUL.

nviOccSchedule

Occupancy Schedule In

There are 2 distinct modes of operation: local schedule and
network schedule. The local schedule mode causes the T7350H
to change set points by using the scheduler in the T7350H. The
network schedule mode causes the T7350H to change set points
from a network-based scheduler. The network schedule, when
valid, overrides the local schedule.
The network schedule input is nviOccSchedule. This input has
current state, next state and tuncos (Time Until Next Change of
State). It is bound from another scheduler such as the XL15A or
T7300/Q7300H. The XL15B or a workstation can also write to it in
an “unbound” relationship.
If the network schedule is not periodically updated the T7350H
resumes local scheduling. Periodically means at a rate greater
than the fail detect time. This rate is typically 55 seconds, 300
seconds maximum. (The actual rate and maximum depend on the
configured heartbeat and failure detect times.)
Current scheduled occupancy state:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
3: OC_STANDBY
Others: same as OC_NUL.
-1: OC_NUL (mains power up and fail detect value).
Next scheduled occupancy state:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
3: OC_STANDBY
Others: same as OC_NUL.
-1: OC_NUL (mains power up and fail detect value).
Time in minutes until next scheduled change of occupancy state:
0: (mains power up and fail detect value).

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nviOccSensor

LONSPEC™ Ref Name
Occupancy Sensor In

Class
IN

Description
There are 3 distinct modes of operation: local occupancy sensor,
network occupancy sensor, or none.
The network occupancy input is nviOccSensor. It is bound from
another sensor or controller with occupancy status.
Occupancy sensor input from a network device:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
-1: OC_NUL not connected (mains power up and fail detect
value).
Others: same as OC_NUL.
NOTE: If nviOccSensor is not invalid (OC_NUL), nviOccSensor
is used as the occupancy sensor even if another sensor
or no sensor is configured.

nviOutdoorTemp

Outdoor Temperature In

Outdoor temperature input from a network device. Ignored unless
nciConfig.oDAirSensor specifies a network configuration.
327.67: means to ignore comODTemp.
327.67: mains power up and failure detect value.
NOTE: If nviOutdoorTemp is not invalid (327.67), nviOutdoorTemp is used as the outdoor temperature even if another
sensor or no sensor is configured.

nviPgm

Program In

Memory address and data being sent to cover assembly flash
memory.

nviRequest

Request

Input variable for managing network requests for status.

nviSetpoint

Setpoint In

Desired space temperature (Celsius) set by remote network
device.
327.67: means to ignore nviSetPoint.
327.67: mains power up value.

nviSpaceRH

Space Humidity In

Space humidity input (percent) from a network device. Ignored
unless nciConfig.humiditySensor specifies a network
configuration.
163.83: mains power up and failure detect value.
NOTE: If nviSpaceRH is not invalid (163.83), nviSpaceRH is
used as the space relative humidity even if another sensor or no sensor is configured.

nviSpaceTemp

Space Temperature In

When configured for a network sensor and periodically updated,
the network space temperature sensor will override both the local
and remote sensors.
Space temperature input (Celsius) from a network device. Values
less than -2.2 will be clipped to -2.2. Values greater than 60 will be
clipped to 60.
327.67: means to ignore nviSpaceTemp.
327.67: mains power up and failure detect value.
NOTE: If nviSpaceTemp is not invalid (327.67), nviSpaceTemp is
used as the space temperature even if another sensor or
no sensor is configured.

nviTimeSet

63-4368

Time In

Set current month, day, year, hour, minute, second
Time synchronization will be to a network device that has been
designated as the “time master.” Time synchronization will occur at
the Guaranteed Periodic Update rate (typically every 55 seconds).

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nvoAlarmH

LONSPEC™ Ref Name
Alarm Out

Class
OUT

Description
Alarm subnet, node and type.
Alarm subnet is the LonWorks subnet number in domain entry to
which nvoAlarmH is bound. If nvoAlarmH is not bound reports
domain index 0.
0: Invalid subnet (power up value).
1-255: Subnet number.
Alarm node is the LonWorks node number (in domain entry to
which nvoAlarmH is bound. If nvoAlarmH is not bound reports
domain index 0).
0: Invalid entry (power up value).
1-127: Node number.
Alarm type is the alarm type being issued:
0: AT_NO_ALARM (power up value).
1: AT_INVALID_SUBBASE_TYPE
2: AT_NETWORK_COMM_FAIL
3: AT_SENSOR_FAIL
4: AT_INVALID_IO_CONFIG
5: AT_COVER_COMM_FAIL
6: AT_COVER_SUBBASE_MISMATCH
-127: AT_rtnINVALID_SUBBASE_TYPE
-126: AT_rtnNETWORK_COMM_FAIL
-125: AT_rtnSENSOR_FAIL
-124: AT_rtnINVALID_IO_CONFIG
-123: AT_rtnCOVER_COMM_FAIL
-122: AT_rtnCOVER_SUBBASE_MISMATCH
-1: AT_ALARM_NOTIFY_DISABLED

nvoAlarmLog

Alarm Log Out

OUT

Reports the last five alarms.

nvoAlarmStatus

Alarm Status Out

OUT

Status of the following alarms states:
Communications between the cover and sub-base.
0: No alarm (power up value).
1: The communications between the thermostat cover
assembly and the sub-base has failed in one or both directions.
The data from the cover to the sub-base has not been received
for at least 90 seconds, or data from the sub-base is not
updating the cover assembly.
Output configuration error:
0: No alarm (power up value).
1: The number of outputs configured exceeds the capability of
the sub-base to support them. Considers sub-base type, heat
pump / conventional application, maxCoolStgs, maxHeatStgs.
Sub-base type error:
0: No alarm (power up value).
1: The sub-base is not a valid sub-base type for the firmware in
the cover assembly.
Network Communications Failure:
0: No alarm (power up value).
1: One of the bound network input variables is not being
updated periodically. This alarm may be caused by a failed
node or a damaged LonWorks network cable.
Sensor failure:
0: No alarm (power up value).
1: One of the analog sensors on the cover assembly has failed
or is out of range (high or low).

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nvoBypass

LONSPEC™ Ref Name
Bypass Out

Class
OUT

Description
The T7350H uses nvoBypass to command bypass to other XL10
nodes. When the T7350 is in bypass, it commands nvoBypass.
This is a one to many bound relationship. “Many” means one
T7350H can command bypass on all XL10s connected on the
subnet.
Reports whether this device is in timed bypass of the scheduled
occupancy state. Used by other devices to also bypass the time of
day schedule.
Value
State
Action
0
0
This device is not in bypass
Power up value
1

100

This device is in bypass

nvoData1

OUT

Reports Manufacturer Specific Device Data including:
bypassTime, coolStgsOn, DaysLeftKeypadHoliday, dischTemp,
effMode, effOccCurrentState, effSetPt, fan, heatStgsOn, oDTemp,
percentCmd,Cool, percentCmdHeat, spaceHumidity, spaceTemp,
subBaseType, sysMode, terminalLoad.

nvoData2

OUT

Reports Manufacturer Specific Device Data including: auxRelay,
DALimit, dehumidActive, ESR, holiday, noAuxHeat1, noAuxHeat2,
occSensor, relayAux, relayCool1, relayCool2, relayCool3,
relayFan, relayHeat1, relayHeat2, relayHeat3, remoteStPtOffset,
schedNextState, scheduledState, scheduledTuncos, stagesActive,
T7350CommWorks, temporarySetPt, totalError.

nvoDischAirTemp

Discharge Temperature
Out

OUT

The current discharge air temperature (Celsius). The sensor is
configured by nciConfig.dischAirSensor. A value of 327.67 means
the sensor is not functioning correctly or is out of range.
327.67: Power up value.

nvoEffectOccup

Effective Occ Out

OUT

Current effective occupancy state:
0: OC_OCCUPIED (power up value).
1: OC_UNOCCUPIED
2: OC_BYPASS
3: OC_STANDBY
-1: OC_NUL

nvoEffectSetpt

Effective Stpt Out

OUT

Effective room temperature control set point (Celsius).
327.67: Power up value.

nvoError

OUT

Device error status. Refer to Appendix C - Network Error
Reporting for details.

nvoFileStat

File Status Out

OUT

File transfer status.

nvoHeatCool

Application Mode out

OUT

Effective operating mode:
0: HVAC_AUTO
1: HVAC_HEAT (heat or re-heat).
3: HVAC_COOL
6: HVAC_OFF (power up value).
7: HVAC_TEST (manual mode or cover in factory test mode).
8: HVAC_EMERG_HEAT

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T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nvoOccSchedule

LONSPEC™ Ref Name
Time Of Day Out

Class
OUT

Description
This output has current state, next state and tuncos (Time Until
Change of State). This output is typically bound to other
controller(s) that need a schedule command.
This output is the combination of the local schedule and the
network schedule command. It doesn’t include any bypass,
override, or manual occupancy commands that affect this T7350H.
There is no TOD assignment table in the T7350H. The T7350H
allows a one to many binding of nvoOccSchedule. This means
one T7350H can command all of the XL10s on the subnet – up to
119 controllers.
Current scheduled occupancy state:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
3: OC_STANDBY
-1: OC_NUL (power up value).
Next scheduled occupancy state:
0: OC_OCCUPIED (power up value).
1: OC_UNOCCUPIED
3: OC_STANDBY
-1: OC_NUL (power up value).
Time in minutes until next scheduled change of occupancy state:
2880: Means there is not a next change of occupancy state or it is
longer than 2 days from now (Power up value).

nvoOccSensor

Occupancy Sensor Out

OUT

Status of occupancy sensor:
0: OC_OCCUPIED
1: OC_UNOCCUPIED
-1: OC_NUL (not configured and power up value).

nvoOutdoorTemp

Outdoor Temperature Out OUT

The current outdoor temperature (Celsius). The sensor source is
specified by nciConfig.oDAirSensor. A value of 327.67 means the
sensor is not functioning correctly or is out of range.
327.67: Power up value.

nvoPgm

Program Out

OUT

Cover assembly flash memory programming data.

nvoSpaceRH

Space Humidity Out

OUT

The current space humidity (percent). The sensor source is
specified by nciConfig.humiditySensor. A value of 163.84 means
the sensor is not functioning correctly or is out of range.
163.84: Power up value.

nvoSpaceTemp

Space Temperature Out

OUT

The current space temperature (Celsius). The sensor source is
specified by nciConfig.spaceSensor. A value 327.67 means the
sensor is not functioning correctly or is out of range.
327.67: power up value.

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Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nvoStatus

LONSPEC™ Ref Name
Status

Class
OUT

Description
Status:
Alarm notify disabled:
0: Alarm notification is turned on (power up value).
1: Alarm notification via nvoAlarmH, nvoAlarmLog,
nvoUnitStatus, and nvoStatus has been turned off.
Alarm
0: no alarm (power up value).
1: there is an alarm.
Override the delays associated with automatic control:
0: Delays turned on (power up value).
1: Delays turned off (Useful for troubleshooting).
Invalid ID:
0: The request was for a valid ID (Power up value).
1: The request was not for a valid ID.
Invalid Request:
0: The request was for a valid operation (Power up value).
1: Invalid request for an operation.
Manual control:
0: The function block is in automatic operation (power up
value).
1: The function is in manual operation and outputs respond to
nviManValue.
Status report. Function block number being in status report:
0: Node function block.
1: Space comfort controller function block.
Programming Mode:
0: Normal operating mode (power up value).
1: The node is in the “programming the cover flash memory”
mode, and is not automatically controlling temperature.
Report mask:
0: Normal operation (power up value).
1: RQ_REPORT_MASK received. The status bits that are set
have been implemented.

nvoTerminalLoad

Terminal Load Out

OUT

Terminal load (percent): Reports the demand for supply energy.
Positive numbers are cooling demand and negative numbers are
heating demand. 100 percent is full capacity. Terminal loads
greater than 100 percent or less than -100 percent indicate that
the equipment is not able to supply the required heating or cooling
energy. The valid range is between 163 and minus 163 percent.
Terminal load is used by supervisory level control applications to
reset Boiler or Chiller discharge water temperatures.
163.84: Power up condition.

nvoTime

Time Out

OUT

Current year, month, day, hour, minute, second.
The T7350H can be a time master to other T7350Hs, XL15As, and
Q7300s.

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Table 21. T7350H Network Variable Summary. (Continued)
Nv Name
nvoUnitStatus

LONSPEC™ Ref Name
Unit Status

Class
OUT

Description
Unit Status:
Percentage of cooling capability currently being supplied to the
controlled space.
163.84: Power up value.
Fan turned on or off:
0: Fan not running.
100: Fan running.
163.84: (power up value).
Percentage of auxiliary heating capability currently being supplied
to the controlled space (Applies to heat pump application only):
163.84: Power up value.
Alarm report:
0: No alarms reported in the unit (power up value).
1: One or more alarms reported in the unit.
-1: The Alarms have been suppressed by alarm notified
disabled command.
Effective operating mode:
0: HVAC_AUTO (power up value).
1: HVAC_HEAT
3: HVAC_COOL
6: HVAC_OFF (power up value).
7: HVAC_TEST (manual mode or cover in factory test mode).
8: HVAC_EMERG_HEAT

63-4368

T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT

Class Description
CONFIG: LonMark network configuration parameters
FTP CONFIG: Configuration parameters implemented with
the LonMark file transfer protocol
IN: Network variable inputs.
OUT: Network variable outputs.

ZIRE and TUNGSTEN are trademarks of palmOne, Inc.
HotSync and Palm OS are registered trademarks of PalmSource, Inc.
Palm is a trademark of PalmSource, Inc.
TRGPro is a trademark of HandEra, Inc.
LONMARK®, LONTALK®, and LONWORKS® are registered trademarks of Echelon® Corporation.
LonSpec™, and LonStation™ are trademarks of Echelon® Corporation.

Automation and Control Solutions

Honeywell International

Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422

Control Products
Honeywell Building
17 Changi Business Park Central 1
Singapore 486073

63-4368

B.B. 11-04

Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9

Honeywell Europe S.A. Honeywell Latin American
Region
3 Avenue du Bourget
1140 Brussels
Belgium

480 Sawgrass Corporate Parkway
Suite 200
Sunrise FL 33325

www.honeywell.com

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Title                           : 63-4368 - T7350 Commercial Programmable Thermostat
Description                     : System Engineering
Author                          : Honeywell
Subject                         : System Engineering

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Honeywell Commercial Programmable T7350 Users Manual 63 4368 Thermostat

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